I "feel" your pain. I've had two rotator cuff repairs (not fun), one while I was working and one last year. Laminectomy while I was still working, which hurt like all heck but fixed the sciatic nerve group problem. My problem is my back. They call it spinal stenosis. I have curvature of the spine, which caused two degenerating discs and three bulging discs surrounding those. No operation that works for whatever I have, so I gotta call for for pain meds refills every 30 days. People with no pain say "you shouldn't take those; you could OD." OD my butt! They're made for a reason. I don't go shooting up heroin laced with dinosaur tranquilizers! Do your best to drop some weight and get the operation. Easier said than done, but it does help with knee pain a lot. I dropped 25 lbs. before I retired and since two years ago today, when I retired, I'm down to a stealth 200# thanks to losing about 20# more. My back is the only thing Doc says she can't fix and doesn't advise it; neither does every Orthopaedic Surgeon who has cut into me. Biggest problem is running out of meds a week before they're due for refill, but I'm slowly straightening that out. Good luck with dropping the weight. It's easier said than done! I turned 65 two weeks ago and there's no way I could've kept working until then, but I really can't do the stuff I used to do. I even tried smoking that pot from the dope dispensaries but it's sure a heck of a lot stronger than than anything we had 40 years ago. And it doesn't work on my pain. (But, it sure makes those old You Tube videos a lot more interesting!)
Good luck! And, seriously, be careful with the pain meds...they're gonna cut you off them soon after your hip repair.
I have sadly inherited my mother's family (Every single descendant of my great great great grandmother, with ONE exception, has moderate to severe back issues, this is a couple of hundred of us!)crappy back. In 1998, my back pain adventure started. I got sciatica down my right leg, BAD. A trip to who was my mom's orthopedic doc and some tests showed I had FIVE discs that were "eroding" in my back and neck. In 2007, when I fell and spent from August to almost the end of the year in and out of the hospital, rehab, hospital, rehab, I was told ALL of my neck discs were bad, and I already suspected it as my neck began to sound like it has broken glass in it around 2000. From the fall, I crushed a nerve in my right knee, and it was almost totally numb for over 3 years. Now, it's about 85% "back" but still feels like bugs are moving inside it sometimes. I tore my right shoulder up keeping my face from slamming into the sidewalk when I fell and also tore my bicep up badly. Falling down in therapy partially tore my left quadricep, and a few days later, back in therapy, I finished tearing it off completely. After surgery, back to rehab, where I was sent home about a week too soon. I had to go back to work or lose my job, so I struggled through that, and only managed to fall down a few times, without any real injuries. My left shoulder was already having problems made worse by the earlier therapy I had on it (Ice/cold packs are a huge NO for me!). I cannot stand still for long, I get muscle spasms just above my butt and the pain is very bad. I can sit without pain at all, I can lie down as long as I have my upper body raised up a few degrees. I can walk a fair distance with a rollator, but with a cane, going into a store from the handicap parking is about it, as my back ties up at most about 30 steps in. The exercise part is probably not really going to be a big part of my weight loss, it's just gonna be not eating much at all. I did drop weight in rehab, just because of the not so great food that I basically ignored.
In short, I'm a mess, very similar to what my mom had, but about 5 years ahead of her. Wonderful. She made it to 87, but by 80, she was complaining about still being around. When it was her 87th birthday, she said, "Oh, I hope this is the last one, I'm so tired of hurting!". I would have bet money it wouldn't be, but I was wrong, a little of 3 months later, she was gone. From the age of about 73 or so until the end, she was on MAJOR painkillers, 2 40 Oxycontin/Something else at first, and 4 percocets at day. She was sharp till the end, able to remember phone numbers and addresses back to her childhood. I share the abilty to remember totally useless info too, as my friends find it endlessly entertaining to ask me the name of almost anyone who has ever been on TV or in a movie. I'm correct probably 99.8% of the time. I can also sing just about every jingle ever put on TV since about 1960. What a talent!